Glycerol → 4-(Acetyloxy)-2-butanone
反応式
[OH:1][CH2:2][CH:3](CO)O.[OH:7][CH2:8][CH2:9][C:10](=[O:12])[CH3:11].C(OCC)(=O)CC(C)=O.[H-].[Al+3].[Li+].[H-].[H-].[H-]>O>[C:2]([O:7][CH2:8][CH2:9][C:10](=[O:12])[CH3:11])(=[O:1])[CH3:3]参加物
6
実験手順
The method described in Example 5 is followed starting with glycerol and 4-hydroxy-2-butanone, suitably protected at the hydroxy group with an acetyl radical. 4-acetoxy-2-butanone is prepared starting from ethyl acetoacetate, protected at the carbonyl group as diethylacetal, by reduction with lithium-aluminium hydride, followed by restoring the keto group by means of silica in the presence of water (A: Banerje 8 G. P. Kalena, Synth. Commun (1982) 12, 225). 1,3-dioxolane-2-methyl-2'-(2-hydroxyethyl-4-acetylthiomethylene distills at 164°-170° C. (10 mm Hg). Yield 61%.
後処理
- distillation1,3-dioxolane-2-methyl-2'-(2-hydroxyethyl-4-acetylthiomethylene distills at 164°-170° C. (10 mm Hg)
出典と根拠
- ORDレコード
- ord-2e7d0c3e6c13486b814b78a283fe37cb
- 出典データセット
- uspto-grants-1990_03
- 特許番号
- US04910220
反応ノート
読み込み中…